Algebra, Solving Three Equations (x, y and z) in Algebra
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7:04
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@CodeValkyRie When I multiply the blue (top equation) by negative 1 and add it to the yellow equation, the x's in those two equations go away. I do this to get rid of the x's and then I am down to just the y and the z.
algebrafun 11 months ago
at 0:24, why did you multiply by -1?
CodeValkyRie 11 months ago